Glassy igneous rocks (i.e. obsidian) are cooled very rapidly.
I believe the answer is hormones. correct me if i'm wrong.
Bacteriophages are viruses that infect and duplicate within a bacterium. Temperate phages (such as lambda phage) can keep reproducing using both the lytic and the lysogenic cycle.
SO.... Bacteriophages
I believe is the answer that you are looking .
Let me know if its right or wrong!!
The answer is,Different animals with similar structures:)
